If you are in the EU, the newest beta of iOS 17.4 has the alternative default browser picker when you first open Safari.

Here’s what it looked like on my French iPhone:

@nileane I want firefox with their own browser engine! But alas, I'm in the UK and I'm damned sure Apple won't extend the benefits of what is in effect an anti-trust settlement to Brexitland.
@cstross Given the way our government is going we might not even have Apple around soon.
@nini I suspect the UK government will cave (without admitting it) before shoving Apple out the door. Ministers love their iPhones too much.